[GitHub] [incubator-doris] caiconghui commented on pull request #6292: [Optimize] Make light schema change complete more faster

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caiconghui commented on pull request #6292:
URL: https://github.com/apache/incubator-doris/pull/6292#issuecomment-886213876


   > I don't get it, why it get faster than before?
   > I notice that you put a limit number of active jobs in a new thread pool and let them run concurrently?
   
   on our production environment, there are usually some tables added columns at the same time, and now these table are loaded data all time by stream load, so We hope that adding column operation can be complished as soon as possible, or stream load can be more slower when it should write two copies of data. now, it waste time to sleep and schema change jobs will affect each other, so here I change the interval for schema change check and add threadpool to make schema change jobs wouldn't affect each other.


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